Um, I meant BigDecimal, not BigInteger. On 12/10/10 18:24, Felix H. Dahlke wrote: > You could use BigInteger, which was created to work around double's > rounding issues - among other things. > > (- 12.305M 12.3049M) > 0.0001M > > On 12/10/10 18:17, cej38 wrote: >> I keep running into this type of problem: >> >> user=> (- 12.305 12.3049) >> 9.999999999976694E-5 >> >> The computer (probably the JVM) has just lied to me. Any fourth grade >> student will know that this does not equal 0.0001. This would be less >> of a problem is the JVM was consistent; if it were consistent then the >> following equality would be true: >> >> user=> (= 0.0001 (- 12.305 12.3049)) >> false >> >> Now it has lied to me again! >> >> I need a method to reliably compare two numbers. My first choice >> would be to have the JVM compute (- 12.305 12.3049) correctly. >> Barring that, I need a way to, without fail, compute the truthfulness >> of the following: =, <, >, <=, >=. >> > >
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